Tire-abrader



F. Nl CORDELL.

TIRE ABRADER.

APPLICATION FILI-:IJ AuG.2s, 1918.

1,349,366, PaIenIedAug. 10,1920.

UNITED STATES FRANK N. CORDELL, or sr. LOUIS, MISSOURI.

TIRE-ABRADER.

Specification of Letters Patent.

Patented Aug. 10, 1920.

Application led August 28, 1918. Serial No. 251,825.

To czZZ whom t may concern.'

Be it known that I, FRANK N. CoRDnLL, a citizen of the United States, residing at the city of St. Louis, State of Missouri, have invented certain new and useful Improve* ments in Tire-Abraders, of which the following is a specification.

This invention is an improved abrader for rubber for making repairs in inner tubes for automobile tires and the like. One of its chief merits is its cheapness, and another is its convenience.

in the accompanying drawings forming part of this specification, in which like numbers of reference denotel like parts wherever they occur,

Figure l is an end elevation;

Fig. 9. is a bottom plan view; and

Fig. 3 is a side elevation.

In order that the adhesive material used for attaching a patch over a perforation or puncture in an inner tube of an automobile tire may take hold of the surface of the said tube, it is necessary that the same shall be abraded so as to roughen the same. The lack of a suitable implement for this purpose has in the past frequently resulted in the application of a patch without this precaution. The result of attachment of a patch without roughening the surface of the inner' tube is that after short use the patch becomes detached. This produces another flat tire,77 with consequent inconvenience and delay. Every time a car runs even for a few feet on a fiat tire, expensive injury to the outer casing or shoe occurs.

The primary purpose of the present invention is to provide so cheap an abrader for the purpose hereinabove indicated that there is n`o reason for any car being unequipped therewith, and one so convenient to handle and so effective in operation, that it will be used without reluctance.

This present device is made from a blank consisting of a straight piece of tin or the like bent into the form most clearly shown in Fig. l, in which the handle l is formed from the ends of the said blank, while the abrading face 2 is formed from the middle part of the said blank. The abrading prongs 3 are formed in a simple manner by merely punching a plurality of perforations through the face 2. The metal that is forced out when, the,said perforations are made constitute the prongs 3, of which there may be any desired number. The prongs 3 are quite sharp and therefore make an eX- cellent rough surface.

The abrading face 2 is quite stiff, due to the relation thereto of the stiifening members d, the corners 5 of which meet. When the thumb and foreiinger grasp the handle l, the lips 6 and 7 slide relative to each other as the opposite sides of handle l are pressed together.

The form of the handle l is such as to be very comfortable for the thumb and forelinger, and also to afford a good grasp thereon.

Having thus described this invention, I hereby reserve the benefit of all changes in form, arrangement, order, or use of parts, as 1t is evident that many minor changes may be made therein without departing from the spirit of this invention or the scope of the following claims.

T claim:

i.'An abrading device for rubber comprising a single piece of metal bent intermediate its length and punched to form an abrading surface, the metal at opposite ends of the abrading surface being inwardly bent and said bent portions being spaced apart and thence bent upwardly to form opposite handles, the metal at the ends of the upwardly bent handles being bent inwardly and overlapped and relatively movable, whereby when the handle portions are squeezed together, the abrading surface is bulged downwardly to stiffen said surface when downward pressure is exerted on the handles.

2. A scraping device constructed of a single piece of sheet metal and comprising a flat body-portion provided with scraping teeth, inwardlyand upwardly-bent portions overlying said body-portion and having their inner ends spaced apart, and upwardly-bent portions diverging from the ends of said inwardly-bent portions and forming yielding finger-grips for the scraping device.

In testimony whereof I hereunto aiiix my signature.

FRANK N. ooRnELL. 

